At least 700,000 years ago, the world’s largest sand island emerged as the barrier that helped the Great Barrier Reef form; James Shulmeister & Daniel Ellerton; The Conversation

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Establishing the age of K’gari (Fraser Island) confirms it emerged before the reef, despite the climate being suitable for coral growth long before then.

Source: At least 700,000 years ago, the world’s largest sand island emerged as the barrier that helped the Great Barrier Reef form

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